Hornady 357 SIG Unprimed Brass Cases -Concentricity helps to ensure proper bullet seating in both the case and the chamber of your firearm. We manufacture to extremely tight tolerances to ensure this critical element is as consistent as possible. We treat Hornady brass as the foundation for an accurate cartridge, not a commodity. Because we take greater care in its creation you'll get more reloads from Hornady brass. Every single Hornady case, regardless of the lot in which it was produced, is virtually identical to other Hornady cases in the same caliber. For you, this means consistent pressures, velocity and accuracy, every time. Caliber: 357 SIGCases Per Box: 100